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# ATC/UNITRON COMPUTER & COMPUTER PARTS
U 6983
Processor Pentium
Processor 75/90/100/120/133/150MHz
Speed
Chip Set Unidentified
Max. Onboard 256MB
DRAM
Cache 256/512/1024KB
BIOS Award
Dimensions 330mm x 218mm
I/O Options 32-bit PCI slots (4), floppy drive interface,
green PC connector, IDE interfaces (2), parallel
port, PS/2 mouse interface, serial ports (2),
cache slot
NPU Options None
IMG IMG 1
+------------------------------------------------------------+
| CONNECTIONS |
|------------------------------------------------------------|
| Purpose | Location | Purpose | Location |
|-----------------+----------+--------------------+----------|
| Turbo LED | J1 | Parallel port | J12 |
|-----------------+----------+--------------------+----------|
| Turbo switch | J2 | Serial port 2 | J13 |
|-----------------+----------+--------------------+----------|
| Reset switch | J3 | IDE interface LED | J14 |
| | | 2 | |
|-----------------+----------+--------------------+----------|
| Speaker | J4 | IDE interface LED | J15 |
| | | 1 | |
|-----------------+----------+--------------------+----------|
| Power LED & | J5 | IR connector | JP32 |
| keylock | | | |
|-----------------+----------+--------------------+----------|
| Green PC | J6 | PS/2 mouse | MS2 |
| connector | | interface | |
| | | (optional) | |
|-----------------+----------+--------------------+----------|
| IDE interface 2 | J7 | 32-bit PCI slots | PC1 - |
| | | | PC4 |
|-----------------+----------+--------------------+----------|
| IDE interface 1 | J8 | Chassis fan power | PS1 |
|-----------------+----------+--------------------+----------|
| Serial port 1 | J10 | Cache slot | SL1 |
|-----------------+----------+--------------------+----------|
| Floppy drive | J11 | | |
| interface | | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| USER CONFIGURABLE SETTINGS |
|------------------------------------------------------------|
| Function | Jumper | Position |
|--------------------------------------+--------+------------|
| » | CMOS memory normal operation | JP5 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | CMOS memory clear | JP5 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP8 | N/A |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP10 | N/A |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | BIOS type select EPROM | JP13 | Open |
|---+----------------------------------+--------+------------|
| | BIOS type select 5v flash | JP13 | pins 1 & 2 |
| | | | closed |
|---+----------------------------------+--------+------------|
| | BIOS type select 12v flash | JP13 | pins 2 & 3 |
| | | | closed |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP19 | N/A |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP22 | N/A |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP23 | N/A |
| | alter | | |
|---+----------------------------------+--------+------------|
| » | Factory configured - do not | JP30 | N/A |
| | alter | | |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0/0A | Bank 1 |
|------------------+--------------------+--------------------|
| 1MB* | (1) 256K x 36 | NONE |
|------------------+--------------------+--------------------|
| 2MB* | (1) 512K x 36 | NONE |
|------------------+--------------------+--------------------|
| 4MB* | (1) 1M x 36 | NONE |
|------------------+--------------------+--------------------|
| 8MB* | (1) 2M x 36 | NONE |
|------------------+--------------------+--------------------|
| 16MB* | (1) 4M x 36 | NONE |
|------------------+--------------------+--------------------|
| 32MB* | (1) 8M x 36 | NONE |
|------------------+--------------------+--------------------|
| 64MB* | (1) 16M x 36 | NONE |
|------------------+--------------------+--------------------|
| 2MB | (2) 256K x 36 | NONE |
|------------------+--------------------+--------------------|
| 4MB | (2) 512K x 36 | NONE |
|------------------+--------------------+--------------------|
| 4MB | (2) 256K x 36 | (2) 256K x 36 |
|------------------+--------------------+--------------------|
| 6MB | (2) 512K x 36 | (2) 256K x 36 |
|------------------+--------------------+--------------------|
| 6MB | (2) 256K x 36 | (2) 512K x 36 |
|------------------+--------------------+--------------------|
| 8MB | (2) 1M x 36 | NONE |
|------------------+--------------------+--------------------|
| 8MB | (2) 512K x 36 | (2) 512K x 36 |
|------------------+--------------------+--------------------|
| 10MB | (2) 1M x 36 | (2) 256K x 36 |
|------------------+--------------------+--------------------|
| 10MB | (2) 256K x 36 | (2) 1M x 36 |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DRAM CONFIGURATION (CON'T) |
|------------------------------------------------------------|
| Size | Bank 0/0A | Bank 1 |
|------------------+--------------------+--------------------|
| 12MB | (2) 1M x 36 | (2) 512K x 36 |
|------------------+--------------------+--------------------|
| 12MB | (2) 512K x 36 | (2) 1M x 36 |
|------------------+--------------------+--------------------|
| 16MB | (2) 2M x 36 | NONE |
|------------------+--------------------+--------------------|
| 16MB | (2) 1M x 36 | (2) 1M x 36 |
|------------------+--------------------+--------------------|
| 18MB | (2) 2M x 36 | (2) 256K x 36 |
|------------------+--------------------+--------------------|
| 18MB | (2) 256K x 36 | (2) 2M x 36 |
|------------------+--------------------+--------------------|
| 20MB | (2) 2M x 36 | (2) 512K x 36 |
|------------------+--------------------+--------------------|
| 20MB | (2) 512K x 36 | (2) 2M x 36 |
|------------------+--------------------+--------------------|
| 24MB | (2) 2M x 36 | (2) 1M x 36 |
|------------------+--------------------+--------------------|
| 24MB | (2) 1M x 36 | (2) 2M x 36 |
|------------------+--------------------+--------------------|
| 32MB | (2) 4M x 36 | NONE |
|------------------+--------------------+--------------------|
| 32MB | (2) 2M x 36 | (2) 2M x 36 |
|------------------+--------------------+--------------------|
| 34MB | (2) 4M x 36 | (2) 256K x 36 |
|------------------+--------------------+--------------------|
| 34MB | (2) 256K x 36 | (2) 4M x 36 |
|------------------+--------------------+--------------------|
| 36MB | (2) 4M x 36 | (2) 512K x 36 |
|------------------+--------------------+--------------------|
| 36MB | (2) 512K x 36 | (2) 4M x 36 |
|------------------+--------------------+--------------------|
| 40MB | (2) 4M x 36 | (2) 1M x 36 |
|------------------+--------------------+--------------------|
| 40MB | (2) 1M x 36 | (2) 4M x 36 |
|------------------+--------------------+--------------------|
| 48MB | (2) 4M x 36 | (2) 2M x 36 |
|------------------+--------------------+--------------------|
| 48MB | (2) 2M x 36 | (2) 4M x 36 |
|------------------+--------------------+--------------------|
| 64MB | (2) 8M x 36 | NONE |
|------------------+--------------------+--------------------|
| 64MB | (2) 4M x 36 | (2) 4M x 36 |
|------------------+--------------------+--------------------|
| 66MB | (2) 8M x 36 | (2) 256K x 36 |
|------------------+--------------------+--------------------|
| 66MB | (2) 256K x 36 | (2) 8M x 36 |
|------------------+--------------------+--------------------|
| 68MB | (2) 8M x 36 | (2) 512K x 36 |
|------------------+--------------------+--------------------|
| 68MB | (2) 512K x 36 | (2) 8M x 36 |
|------------------+--------------------+--------------------|
| 72MB | (2) 8M x 36 | (2) 1M x 36 |
|------------------+--------------------+--------------------|
| 72MB | (2) 1M x 36 | (2) 8M x 36 |
|------------------+--------------------+--------------------|
| 80MB | (2) 8M x 36 | (2) 2M x 36 |
|------------------+--------------------+--------------------|
| 80MB | (2) 2M x 36 | (2) 8M x 36 |
|------------------+--------------------+--------------------|
| 96MB | (2) 8M x 36 | (2) 4M x 36 |
|------------------+--------------------+--------------------|
| 96MB | (2) 4M x 36 | (2) 8M x 36 |
|------------------+--------------------+--------------------|
| 128MB | (2) 8M x 36 | (2) 8M x 36 |
|------------------+--------------------+--------------------|
| 128MB | (2) 16M x 36 | NONE |
|------------------+--------------------+--------------------|
| 130MB | (2) 16M x 36 | (2) 256K x 36 |
|------------------+--------------------+--------------------|
| 132MB | (2) 16M x 36 | (2) 512K x 36 |
|------------------+--------------------+--------------------|
| 136MB | (2) 16M x 36 | (2) 1M x 36 |
|------------------+--------------------+--------------------|
| 144MB | (2) 16M x 36 | (2) 2M x 36 |
|------------------+--------------------+--------------------|
| 160MB | (2) 16M x 36 | (2) 4M x 36 |
|------------------+--------------------+--------------------|
| 192MB | (2) 16M x 36 | (2) 8M x 36 |
|------------------+--------------------+--------------------|
| 256MB | (2) 16M x 36 | (2) 16M x 36 |
|------------------------------------------------------------|
| Note: Sizes with an * present use only Bank 0A. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE CONFIGURATION |
|------------------------------------------------------------|
| Size | Bank 0 | TAG | SL1 |
|-------------+---------------+--------------+---------------|
| 256KB (A) | (8) 32K x 8 | (1) 16K x 8 | Not installed |
|-------------+---------------+--------------+---------------|
| 256KB (B) | NONE | NONE | Installed |
|-------------+---------------+--------------+---------------|
| 512KB (A) | (8) 64K x 8 | (1) 16K x 8 | Not installed |
|-------------+---------------+--------------+---------------|
| 512KB (B) | NONE | NONE | Installed |
|-------------+---------------+--------------+---------------|
| 1MB | (8) 128K x 8 | (1) 32K x 8 | Not installed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CACHE JUMPER CONFIGURATION |
|------------------------------------------------------------|
| Size | JP8 | JP10 |
|------------+--------------------------+--------------------|
| 256KB | pins 1 & 2 closed | pins 2 & 3 closed |
|------------+--------------------------+--------------------|
| 512KB | pins 1 & 2, 3 & 4 closed | Open |
|------------+--------------------------+--------------------|
| 1MB | pins 2 & 3 closed | pins 1 & 2 closed |
|------------------------------------------------------------|
| Note: If SL1 is used, these jumpers are ignored. |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | JP16 |
|----------------------------+-------------------------------|
| 75MHz | Open |
|----------------------------+-------------------------------|
| 90MHz | pins 1 & 2 closed |
|----------------------------+-------------------------------|
| 100MHz | pins 1 & 2, 3 & 4 closed |
|----------------------------+-------------------------------|
| 120MHz | pins 1 & 2 closed |
|----------------------------+-------------------------------|
| 133MHz | pins 1 & 2, 3 & 4 closed |
|----------------------------+-------------------------------|
| 150MHz | pins 1 & 2 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU SPEED CONFIGURATION |
|------------------------------------------------------------|
| Speed | JP9 | JP12 |
|-------------------+--------------------+-------------------|
| 1.5x | Open | Open |
|-------------------+--------------------+-------------------|
| 2x | Closed | Open |
|-------------------+--------------------+-------------------|
| 2.5x | Closed | Closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| CPU VOLTAGE CONFIGURATION |
|------------------------------------------------------------|
| Voltage | JP17 |
|----------------------------+-------------------------------|
| » | 3.3v | pins 1 & 2 closed |
|---+------------------------+-------------------------------|
| » | 3.4v | pins 2 & 3 closed |
|---+------------------------+-------------------------------|
| » | 3.55v | pins 4 & 5 closed |
+------------------------------------------------------------+
+------------------------------------------------------------+
| DMA CONFIGURATION |
|------------------------------------------------------------|
| DMA | JP29 |
|----------------------------+-------------------------------|
| DMA 1 | pins 1 & 3, 2 & 4 closed |
|----------------------------+-------------------------------|
| DMA 3 | pins 3 & 5, 4 & 6 closed |
+------------------------------------------------------------+